A mythical creature that lives in a cave on a mountain. This may used as an insult towards someone, if the person is very aggressive and has no good morals or someone who likes to steal other peoples things.

Slang word meaning cunt from the How I Met Your Mother episode: How Lily Stole Christmas.

Ted: On Marshall's answering machine Hey, Marshall. Still moping on the couch about Lily? Forget about her. You need to get over that Grinch.
Older Ted: Flashback But I didn't say Grinch. I said a bad word. I said a very, very bad word...
Ted: Oh, fudge.
Older Ted: Flashback But I didn't say fudge.

Ted: She took the decorations? That Grinch!
Older Ted: Flashback That time I really did say Grinch.

a bag of weed that is ground up (optional, though best for effect), collected in a corner, and then tied off; in some states dime bags are commonly distributed in this style. this corner looks like the Grinch's head.